Joined bodies, luminous containers and assemblies for high pressure discharge lamps

a high-pressure discharge and assembly technology, applied in the manufacture of electric discharge tubes/lamps, cold cathode manufacturing, electrode systems, etc., can solve the problems of difference between the thermal expansion coefficient of a material, and the adhesion is susceptible to corrosion, so as to achieve the effect of significantly reducing the incidence of cracks
US7187128B2Inactive Publication Date: 2007-03-06NGK INSULATORS LTD
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Patents(United States)
Current Assignee / Owner
NGK INSULATORS LTD
Publication Date
2007-03-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

A joined body is provided, including a first member having a first joining face and sapphire exposed at the first joining face and a second member having a second joining face and sapphire or polycrystalline alumina exposed at the second joining face. The first member and second member are joined by providing a raw material for the joining material between the first and second members and heat treating the raw material at a temperature of 1730° C. or lower.
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Description

[0001] This application claims the benefit of Japanese Patent Application P-2003-150512, filed on May 28, 2003, the entirety of which is incorporated by reference.BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The present invention relates to a joined body, a luminous vessel and an assembly for a high pressure discharge lamp.

[0004] 2. Description of the Related Art

[0005] A high pressure discharge lamp with a discharge vessel of quartz has been widely used as a head light for an automobile due to its high brightness and light emission efficiency. The discharge vessel has a luminous portion and contains a light emitting gas inside of the vessel. The discharge vessel of such discharge lamp is made of quartz and thus transparent, so that the luminous portion may function as a point light source.

[0006] The assignee has filed a Japanese patent publication 2001-76677A, and disclosed a method of inserting pipes of molybdenum into openings at both ends, respectively, of a discha...

Claims

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